Which statement describes a characteristic of a question that can be answered through scientific inquiry? (A.It requires the application of ethical standards.) (B.It can be answered using measurements.) (C.It can be answered using a philosophical argument.) (D.It requires the approval of more than one scientist.)
Answer:
B. It can be answered using measurements.
Explanation:
Scientific inquiry can be defined as the various ways, techniques and approach used by scientists to study the world and provide a detailed description (information) based on the empirical evidence derived from the investigation.
Measurements can be defined as a technique which typically involves the process of identifying and determining the dimensions, quality and quantity of a physical object.
Hence, the statement which best describes a characteristic of a question that can be answered through scientific inquiry is that, it can be answered using measurements. Using scientific inquiry to answer questions entails using measurements to propose specific and evidential explanations, as well as back up theories associated with the question.
Which is NOT a part of an electric motor?
a.
armature
b.
brushes
c.
commutator
d.
slip ring
Is visible light a form of
radiation? Explain.
Answer:
Yes,in fact visible 'light' is a form of radiation, which can be defined as an energy that travels in the form of electromagnetic waves. It can also be described as a flow of particle-like 'wave-packets', called photons, that travel constantly at the speed of light (about 300 000 kilometres per second).
Explanation:
What units would you use to measure a red blood cell ? (nanometers micrometers millimeters
Unit to measure red blood cell is million per cubic millimeter
What is red blood cell ?A red blood cell, also called a hematopoietic cell, hemocyte, is a cell produced through hematopoiesis and found mainly in the blood
Unit to measure red blood cell is million per cubic millimeter
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The figure below shows a shooting competition, where air rifles fire soft metal at distant targets
Answer:
where is the figure?
Explanation:
What are the advantages of two-dimensional art forms like photographs?
What are the limitations of two-dimensional art forms like photographs?
Answer:Two dimensional forms can create the illusion of 3 dimensional shapes and spaces.
Explanation:
Which statement about the relationship between air pressure and air density is accurate?
A) Air pressure decreases as air density increases
B) Air pressure increases as air density increases
C) Air pressure increases as air density decreases
D) Air pressure is unrelated to air density
Answer:
A: Air pressure decreases as air density increases
Explanation:
Pressure is a force exerted on or against an object by being in contact with a substance. Thus, air pressure is due to the bombardment of the air (gas) particles with a surface. Density is defined as the mass per volume of a substance. Thus, air density is defined as the mass of air per unit volume.
If that Explanation does not make any sense let me make it easier.
The air at the top of a mountain is cooler than the air at the bottom. This temperature difference is due to a phenomenon that occurs in Earth’s atmosphere. Air rises and sinks based on differences in temperature and pressure. Here’s a quick experiment that will help explain the role of pressure.Take in a deep breath as if you were ready to blow out birthday candles. Puff your cheeks with air like a chipmunk. Hold it for a few seconds, and then blow the air slowly from your cheeks.Cold air sinks while warm air rises because cold air is denser than warm air. When a lot of cold air sinks, it creates an area of high air pressure where it hits the surface. This high-pressure air flows to an area of low pressure, creating wind. When this air warms, it rises up into the atmosphere.Temperature decreases as altitude increases. That’s why a mountain peak may be covered with snow while the bottom of the mountain is full of green plants and trees. When warm air rises into the atmosphere, it cools. The density of the air increases as it cools, which eventually creates an area of high pressure and starts the cycle again.
If not for this phenomenon of air rising and sinking in the atmosphere, there would be no wind or weather.
I hope that helped!
3. A 3.0 g bullet traveling at a speed of 400 m/s enters a tree and exits the other side with a speed of 200 m/s. Where did the I bullet's lost KE go, and what was the energy transferred? Solution:
Answer:I had two questions: 1) Shouldnt the equation be : Change of internal energy= Change in Ke or KEi +Ui=KEf+Uf .. I cant seem to understand how the change in KE+ Change in Internal Energy equals 0 2) Also, it has a note which says that if the bullet alone was chosen as a system, then work would be done on it and the heat transfer woudl occur. How would one formulate an equation for this?
Explanation:
a catcher "gives" with the ball when he catches a 0.196 kg baseball moving at 31 m/s. if he moves his glove a distance of 5.32 cm, what is the average force acting on his hand?
Answer:
3540.5N
Explanation:
Step one:
given data
mass m= 0.196kg
speed v= 31m/s
distance r= 5.32cm = 0.0532m
Step two
The expression relating force, mass, velocity and distance is
F= mv^2/r
substitute we have
F=0.196*31^2/0.0532
F=0.196*961/0.0532
F=188.356/0.0532
F=3540.5N
help plz will give brainliest and dont answer if u dont know
Answer:
is highly motivated
Explanation:
Question 4
1 pts
What is the mass of a rock sitting on a 10 meters high cliff if it has a potential energy of 500
joules?
50 kg
10 kg
5 kg
1000 kg
Answer:
it's answer is 5 kg
hope it helps youAnswer:
5kg is your answer
I hope it helps mate
I will always help you understanding your assingments
have a great day
I am bored
#Captainpower:)
Emilio pushes a 100 kg freshman with 200 N of force. How much is the freshman accelerated?
Explanation:
F = MA
200 = 100 * A
A = 200/100
A = 2m/sec^2
hope it helps youAn electric motor transforms potential energy into mechanical energy.
Please select the best answer from the choices provided
T
F
Answer:
t
Explanation:
Answer:
False
Explanation:
no wrong answers please
Please help. I will mark you as brainliest !!!
You place a book on top of a spring and push down, compressing the spring by 10 cm. When you let go of the book, it is pushed up by the spring. Which statement describes what happens to the energy of the spring book system?
A. The elastic potential energy of the system increases.
B. The gravitational potential energy of the system increases.
C. The kinetic energy of the system decreases.
D. The total energy of the system increases.
Answer:
Eliminate D as there is no nonconservative force, then look at each energies before and after. The speed of the book will increase, so kinetic energy is increasing. The height of the book is increasing, so gravitational potential energy is increasing. However, since the spring is becoming decompressed, the elastic potential energy is decreasing.
Explanation:
Answer:
it is A
Explanation:
Which natural resource is renewable?
Coal
Wind
Topsoil
Oil
Answer:wind
Explanation:
The natural resource that is renewable is wind. Explanation on wind as a renewable resource can be found below.
What is renewable resource?Renewable resources are those resources that is replenished or replaced by natural processes at a rate comparable to its rate of consumption by humans or other users.
Renewable resources cannot be exhausted as a result of use, unlike, their non-renewable counterparts.
Examples of renewable natural resources are as follows:
SunWindWaterTherefore, the natural resource that is renewable is wind.
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Write a story that includes (in order) the 7 waves of the electromagnetic spectrum. Try incorporating a characteristic about each type of wave. Bold or highlight them.
Answer:
sorry im doing a challenge but i will have someone answer it
Explanation:
Why do you need to learn about Volcanoes?
Answer:
Without volcanoes, most of Earth's water would still be trapped in the crust and mantle . Early volcanic eruptions led to the Earth's second atmosphere, which led to Earth's modern atmosphere . Besides water and air, volcanoes are responsible for land, another necessity for many life forms .
Explanation:
I hope it helpsWhat are the characteristics of a blackbody radiator? Give an example.
Answer:
A blackbody, or Planckian radiator, is a cavity within a heated material from which heat cannot escape. No matter what the material, the walls of the cavity exhibit a characteristic spectral emission, which is a function of its temperature.
Example:
Emission from a blackbody is temperature dependent and at high temperature, a blackbody will emit a spectrum of photon energies that span the visible range, and therefore it will appear white. The Sun is an example of a high-temperature blackbody.
please help me!! will mark brainliest
a ball is thrown vertically upwards from the ground. The ball rises and falls back to the ground. Describe the changes in the mechanical energy of the ball as it rises.
Answer:
as the ball is thrown, the enegry rises up, when it falls, the ball relseases all energy
Explanation:
TRUE OR FALSE Light can travel through materials that you cannot see through, like wood or aluminum foil.
Answer: TRUE
Explanation:
(Example): If there was lightening outside, the lightening (light) could travel through a tree (that you cannot see through).
The statement Light can travel through materials that you cannot see through, like wood or aluminum foil, is True.
What is light?Electromagnetic radiation that the human eye can detect as light. The wavelengths of electromagnetic radiation cover a very broad spectrum. Information about space and time is transmitted by light. This characteristic serves as the foundation for the study of optics, optical communications, and a wide range of other related, both established and developing technologies.
Lasers, holography, and fiber-optic communication systems are examples of technologies that use light manipulation. The electromagnetic spectrum, which includes all forms of light, propagates in a vacuum at the same speeds, c. only a small portion of which is visible to humans. And it is unquestionably possible for non-visible light to pass through wood, including radio waves, x-rays, and gamma-energy photons.
Therefore, the statement Light can travel through materials that you cannot see through, like wood or aluminum foil, is True.
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Hooke's Law Question - Will mark brainliest
A spring of natural length 10cm and spring constant 4.00Ncm −1 has a load of 22.0N placed on it. What is its new length?
Explanation:
Hooke's Law: Fe = kx
x = Fe / k = (22.0N) / (4.00N/cm) = 5.50cm.
10.00cm + 5.50cm = 15.50cm
The new length of the spring is 15.50cm.
Plants appear green because they do not absorb the green wavelengths of light. What happens to those green light waves when they hit a plant? The are diffracted. They are absorbed. They are reflected. They are refracted.
Answer:
They are reflected.
Explanation:
Red light is absorbed while green light is reflected, causing the color to be green in human eyes.
Answer:
C
Explanation:
Jeff uses a solar cell to run a small motor. What energy transformation occurred?
(A) Light to electric to potential
(B) Light to electric to kinetic
(C) Electric to solar to kinetic
(D) Kinetic to electric to mechanical
In the picture above, if the cue stick strikes the 0.2-kg cue ball with a force of 1.1 N, what will be the acceleration of the cue ball?
Answer:
0.55 m/s².
Explanation:
From the question given above, the following data were obtained:
Mass (m) of ball = 2 Kg
Force (F) applied = 1.1 N
Acceleration (a) =?
Force (F) is defined as the product of mass (m) and acceleration (a). Mathematically, the force (F) can be represented as:
Force (F) = mass (m) × acceleration (a)
F = ma
With the above formula, we can calculate the acceleration of the ball as follow:
Mass (m) of ball = 2 Kg
Force (F) applied = 1.1 N
Acceleration (a) =?
F = ma
1.1 = 2 × a
Divide both side by 2
a = 1.1 / 2
a = 0.55 m/s²
Therefore, the acceleration of the ball is 0.55 m/s²
What are the types of motion that can be observed in a pendulum ? Some one please answer.√
Answer:
periodic motion
Explanation:
The massive object is affectionately referred to as the pendulum bob. When the bob is displaced from equilibrium and then released, it begins its back and forth vibration about its fixed equilibrium position. The motion is regular and repeating, an example of periodic motion.
Shawn is doing drills out on the field by pulling a tire behind him for 30 m. If Shawn is applying a net force of
1200 N to pull the tire, then how much work is Shawn doing?
Answer:
The work done by Shawn in moving the tire is 36,000 J
Explanation:
Given;
net force applied by Shawn , F = 1200 N
distance he moved the tire, d = 30 m
The work done by Shawn in moving the tire is calculated as;
W = Fd
Substitute the given values and solve for Work done;
W = 1200 x 30
W = 36,000 J
Therefore, the work done by Shawn in moving the tire is 36,000 J
List various ways through which AIDS spreads
please its aurgent fast
Answer:
Blood, semen, bodily fluids, breast milk
Explanation:
Explanation:
Through.....
1) blood
2) breast feeding
3) semen
4) unprotected sex etc
The north pole of one bar magnet is near the south pole of another bar
magnet. What happens to the magnets?
O A. They repel each other.
B. They attract each other.
C. They twist away from each other.
O D. They neither attract nor repel each other.
Answer: they attract each other .
Explanation: jus took it.
